Method of forming holes in curtains and the like.



F. S.. CARR. METHOD or FORMING HOLES IN CURTAINS AND THE LIKE.

APPLICATION FILED NOV. 29, 1909.

Patented Aug. 23, 1910.

.inclined relatively to others.

UNITED STATES PATENT OFFICE.

FRED S. CARE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CARR FASTENER COM- PANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

METHOD OF FORMING HOLES IN CURTAINS AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 23, 1910.

Original application filed April 19, 1909, Serial No. 490,729. Divided and this application filed November Serial No. 530,385.

To all whom it may concern:

Be it known that I, FRED S. CARR, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Methods of Forming Holes in Curtains and the Like, of which the following is a specification.

This invention relates to the aperturing of sheet material, such as detachable curtains or flexible side pieces of sheet material such as are used to form parts of vehicle body covers, all as explained in my application filed April 19, 1909, Serial No. 490,729, of which application this one is a division. As explained in said former application, a carriage curtain is usually provided with a plurality of sockets arranged in close proximity to its edges, these sockets being adapted to engage studs correspondingly located on the frame work which supports the curtain when in use. The studs and sockets constitute members of so-called stud and socket fasteners, which are well-known articles of manufacture. The studs are usually oblong in cross section, and usually have an elliptical or an approximately triangular cross section. Each stud is attached to the frame work usually by means of screws inserted in orifices formed on the flanged base of the stud. In attaching the studs to the frame work, the workman is liable to so locate the studs that the major axes of their cross sec tions will not be exactly parallel, some being It is desirable to form the sockets in the curtain of such size that they will closely fit the studs without moving loosely crosswise of the studs, and that said sockets correspond in form to the cross sections of the studs. It is desirable that the major axes of the sockets conform accurately to the major axes of the cross sections of the studs. It has been the practice heretofore, after attaching the studs to the frame work, to temporarily support the curtain against the outer ends of the studs and mark the curtain in any convenient way to indicate roughly the location of the socket holes, these being afterward formed by a punch after the curtain has been removed from contact with the studs. It is impossible by this method to obtain the desired degree of accuracy in conforming the socket holes to the studs, and for this reason it is customary to make the socket holes considerably larger than the cross sections of the studs to insure the simultaneous application of all the sockets to the studs when the curtain is placed in position.

My invention has for its object to enable the socket holes in the curtain to correspond accurately with the positions of the studs, so that the socket holes may be formed to accurately fit the studs without loose motion thereon, the holes conforming to any and all transverse inclinations of the studs, so that whatever may have been the irregularities in the locations of the studs due to carelessness of the workmen, the sockets will accurately fit the studs in each instance.

The invention consists in the method which I will now proceed to describe and claim.

Of the accompanying drawings, which illustrate how my present invention may be practiced,Figure 1 represents a side elevation showing a portion of the fixed curtainsupporting frame work provided with a series of stud members, and a portion of a curtain temporarily supported in front of the stud members preparatory to the operation of forming the socket holes in the curtain. Fig. 2 represents a section on line 2-2 of Fig. 1. Fig. 3 represents a perspective view of the cutting die shown in Figs. 1 and 2. Fig. 4 represents a rear end elevation of the die shown in Fig. 3. Fig. 5 represents a longitudinal section of a cutting die having a differently formed base. 'Fig. 6 represents a section on line 66 of Fig. 2. Fig. 7 represents a side view of the portion of the curtain shown in Fig. 1, after the stud-receiving holes have been formed therein.

The same reference characters indicate the same parts in all the figures.

In the drawings,12 represents a frame work which may be of any suitable form and construction adapted to support a flexible side piece or curtain 13 of sheet material. To the frame 12 are afiixed a series of studs 14, each adapted to engage a socket formed for its reception in the curtain. Each stud is provided with a flanged base 15 attached by screws 16 to the frame. The studs may be of anysuitable form and construction, those here shown being of the general form set forth in Letters Patent of the United States, No. 872,796, granted to me December 3, 1907, the form of the stud in cross section being substantially triangular. My invention may be practiced in connection with studs of other form, for example, studs of elliptical form in cross section, as shown in Letters Patent of the United States, No. 874,083, dated December 17, 1907.

I have here represented the stud and its flanged base as made hollow and of sheet metal, but it is obvious thata solid stud, such as is shown in the patents above-mentioned, may be used.

17 represents a hollow cutting die adapted to be placed upon a stud 1 1, the interior of the die being formed to conform closely to the crosssection of the stud, and the outer end of the die being provided with a continuous cutting edge 18 adapted to form a socket hole corresponding accurately to the cross section of the stud. The length of the die is such that when its inner end or base bears on the base flange of the stud, the cutting edge will project considerably beyond the outer end of the stud, as shown in Fig. 2.

A curtain to be provided with socket holes is temporarily suspended in any suitable way adjacent to the series of studs, and just outside their outer end, as indicated in Figs. 1 and 2. The operator then applies the cutting die 17 successively to the different studs of the series and while it is in place on each stud forces the curtain against the cutting edge of the die by means of a mallet or other suitable device, thus causing the die to cut a socket hole in the curtain. This operation is repeated with every stud, so that at the close of the opera? tion, the curtain is provided with socket holes corresponding exactly in number and position with the studs, the direction of the major axes of the socket holes corre sponding exactly in each case with the direction of the major axis of the stud which the hole is to receive. This will be better understood by reference to Fig. 1, where the right hand upper stud and the lower stud are shown with the major axes of their cross sections oppositely inclined, the other stud being shown with the major axis of its cross section vertical.

It will be seen that the cutting die applied to each of the studs represented will conform accurately to the position of the stud, and will cause the major axes of the socket holes formed in the curtain to have the same Variations as those of the studs.

The cutting die shown in Figs. 1, 2, 3, and at is provided with ears or wings 19 which are adapted to bear on the attaching screws 16, and thus prevent the pressure exerted on the die during the cutting operation from indenting the sheet metal base flange 15. \Vhen the die is used with a stud having a solid base flange, the cars 19 may be omitted, or the die may have a continuous flange 20 at its inner end, as shown in Fig. 5.

In Fig. 7, I show the curtain 13 provided with stud-receiving holes 23 conforming to the peculiarities of position of the studs shown in Fig. 1.

I claim:

The method of locating holes in a carriage curtain and the like in accordance with the studs which have been previously secured in position and which studs are to cooperate with said holes, consisting in temporarily locating over each of such studs a die formed to cut an aperture in the material of the curtain, and then pressing the material onto the die to form the aperture, thereby forming a series of holes which, when the die is removed, will accurately cooperate with said studs.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

FRED S. CARR.

\Vitnesses C. F. BROWN, P. W. PEZZETTI. 

